slackware 9.1 compilation problem

 Hello,

 I'm trying to compile devhelp and create package for Slackware 9.1.
 I get the following compilation error:
make[2]: Entering directory `/home/mjanusze/packages/slackware-9.1/devhelp-0.7'
LC_ALL=C ./intltool-merge ./po devhelp.desktop.in devhelp.desktop -d -u -c
./po/.intltool-merge-cache
Generating and caching the translation database
Merging translations into devhelp.desktop.
LC_ALL=C ./intltool-merge ./po devhelp.keys.in devhelp.keys -k -u -c
./po/.intltool-merge-cache
Found cached translation database
Merging translations into devhelp.keys.
Died at ./intltool-merge line 626.
make[2]: *** [devhelp.keys] Error 13
make[2]: Leaving directory `/home/mjanusze/packages/slackware-9.1/devhelp-0.7'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/mjanusze/packages/slackware-9.1/devhelp-0.7'
make: *** [all-recursive-am] Error 2

what is the problem?

--
Marek